(f + g)(-2) means:
add up f and g, then plug in x = -2 and find the answer.
SO,
(f+g)(x) is:
[tex](f+g)(x)=x^2+8+x+6=x^2+x+14[/tex]Now, you put in x = -2 to get:
[tex]\begin{gathered} (f+g)(x)=x^2+8+x+6=x^2+x+14 \\ (f+g)(-2)=(-2)^2+(-2)+14 \\ =4-2+14 \\ =2+14 \\ =16 \end{gathered}[/tex]The ans is 16
